Problem with Acekard2 HELP HELP

Hi everybody ! I'm a new user of romulation and DS.
I have buy an Acekard2 today.
I want to install rom on it. I have followed all topics I've found ... But it doesn't work :'(
Message in DS : SYSTEM FILE IS MISSING ........ ????
The extraction from RAR to NDS is OK (with WRAR370.exe).
What should I add ?
Acekard_2_v4_08beta4_menu.zip and then copy the nds on the microsd ?
R4_V1.18_French.ZIP and then copy the .nds on the microsd ?
What is the notice for use the Acekard2 ?
Thanks in advance for your help ...

Sorry everybody.
It's OK I have found : must first extract the acekard v407a15 and not the beta version.

In case others have this problem in the future, the 4.08 beta is just an update. It doesn't contain the full system and must be copied over an existing set of 4.07a15 files.

Beta is exactly what it says, it's should not be used entirely for your firmware, only for testing purposes.